150
FNCA52 TJSJ 140807
FWFSJU
FIRE WEATHER PLANNING FORECAST FOR PUERTO RICO
NATIONAL WEATHER SERVICE SAN JUAN PR
407 AM AST SUN DEC 14 2025
DISCUSSION
MUCH DRIER CONDITIONS COMPARED TO PREVIOUS DAYS ARE EXPECTED
TODAY ACROSS THE REGION, WITH PRECIPITABLE WATER VALUES NEAR 1.20
INCHES. GIVEN THE EXPECTED WEATHER SCENARIO, RELATIVE HUMIDITY
AND THE KBDI ARE NOT EXPECTED TO MEET FIRE WEATHER CRITERIA.
HOWEVER, BREEZY CONDITIONS ARE EXPECTED ALONG THE SOUTH COAST OF
PR THROUGH THE REST OF THE WEEKEND. THE FIRE DANGER WILL REMAIN
LOW TODAY.
PRZ014-150815-
SOUTHEAST COASTAL PLAINS-
407 AM AST SUN DEC 14 2025
TODAY TONIGHT MON
CLOUD COVER MCLEAR MCLEAR MCLEAR
PRECIP TYPE SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 0 10 10
TEMP (24H TREND) 87 (0) 69 (-4) 87
RH % (24H TREND) 60 (-4) 93 (+1) 57
WIND 20FT/EARLY(MPH) E 19 G25 E 11 SE 9
WIND 20FT/LATE(MPH) E 19 G25 E 11 SE 9
MIXING HGT(FT-AGL/MSL)4420 4130
TRANSPORT WND (MPH) E 23 E 8
VENT RATE (KT-FT) 88400 28910
DISPERSION 5 5
DSI 6 4 5
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ015-150815-
SOUTHERN HILLS-
407 AM AST SUN DEC 14 2025
TODAY TONIGHT MON
CLOUD COVER MCLEAR MCLEAR MCLEAR
PRECIP TYPE SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 10 10 30
TEMP (24H TREND) 84 (+2) 66 (-5) 84
RH % (24H TREND) 63 (-6) 97 (+4) 59
WIND 20FT/EARLY(MPH) SE 16 E 11 SE 9
WIND 20FT/LATE(MPH) SE 16 E 11 SE 9
MIXING HGT(FT-AGL/MSL)5070 5020
TRANSPORT WND (MPH) SE 24 E 8
VENT RATE (KT-FT) 106470 35140
DISPERSION 5 5
DSI 5 3 5
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ016-150815-
NORTH COASTAL PLAINS-
407 AM AST SUN DEC 14 2025
TODAY TONIGHT MON
CLOUD COVER MCLEAR MCLEAR MCLEAR
PRECIP TYPE SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 20 0 10
TEMP (24H TREND) 89 (+2) 68 (-4) 87
RH % (24H TREND) 56 (-11) 99 (+1) 58
WIND 20FT/EARLY(MPH) E 17 G19 SE 11 E 12
WIND 20FT/LATE(MPH) E 17 G19 SE 11 E 12
MIXING HGT(FT-AGL/MSL)5750 3630
TRANSPORT WND (MPH) SE 21 E 8
VENT RATE (KT-FT) 103500 25410
DISPERSION 5 5
DSI 6 3 5
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ017-150815-
NORTHERN HILLS-
407 AM AST SUN DEC 14 2025
TODAY TONIGHT MON
CLOUD COVER MCLEAR CLEAR MCLEAR
PRECIP TYPE SHOWERS NONE SHOWERS
CHANCE PRECIP (%) 30 0 10
TEMP (24H TREND) 87 (+2) 65 (-6) 86
RH % (24H TREND) 55 (-8) 98 (-1) 54
WIND 20FT/EARLY(MPH) SE 14 SE 6 NE 10
WIND 20FT/LATE(MPH) SE 14 SE 6 NE 10
MIXING HGT(FT-AGL/MSL)5970 5110
TRANSPORT WND (MPH) SE 21 E 5
VENT RATE (KT-FT) 107460 20440
DISPERSION 5 5
DSI 6 2 5
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ018-150815-
WEST COAST-
407 AM AST SUN DEC 14 2025
TODAY TONIGHT MON
CLOUD COVER MCLEAR CLEAR MCLEAR
PRECIP TYPE SHOWERS NONE SHOWERS
CHANCE PRECIP (%) 20 0 30
TEMP (24H TREND) 89 (+1) 68 (-4) 88
RH % (24H TREND) 59 (-4) 98 (+3) 56
WIND 20FT/EARLY(MPH) SE 18 E 13 E 9
WIND 20FT/LATE(MPH) SE 18 E 13 E 9
MIXING HGT(FT-AGL/MSL)5230 3980
TRANSPORT WND (MPH) SE 22 E 7
VENT RATE (KT-FT) 99370 23880
DISPERSION 5 5
DSI 5 4 5
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ019-150815-
EASTERN INTERIOR-
407 AM AST SUN DEC 14 2025
TODAY TONIGHT MON
CLOUD COVER MCLEAR MCLEAR PCLDY
PRECIP TYPE SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 10 10 30
TEMP (24H TREND) 85 (+2) 66 (-6) 85
RH % (24H TREND) 63 (-8) 99 (+1) 61
WIND 20FT/EARLY(MPH) SE 16 SE 13 E 8
WIND 20FT/LATE(MPH) SE 16 SE 13 E 8
MIXING HGT(FT-AGL/MSL)4860 5400
TRANSPORT WND (MPH) SE 23 E 7
VENT RATE (KT-FT) 97200 32400
DISPERSION 5 5
DSI 6 2 4
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ022-150815-
LUQUILLO MOUNTAIN RANGE-
407 AM AST SUN DEC 14 2025
TODAY TONIGHT MON
CLOUD COVER PCLDY PCLDY PCLDY
PRECIP TYPE SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 20 20 50
TEMP (24H TREND) 81 (+3) 64 (-6) 81
RH % (24H TREND) 69 (-9) 100 (0) 68
WIND 20FT/EARLY(MPH) SE 14 SE 11 SE 6
WIND 20FT/LATE(MPH) SE 14 SE 11 SE 6
MIXING HGT(FT-AGL/MSL)4310 3940
TRANSPORT WND (MPH) SE 22 E 7
VENT RATE (KT-FT) 81890 23640
DISPERSION 5 5
DSI 6 3 4
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ023-150815-
CENTRAL MOUNTAIN RANGE-
407 AM AST SUN DEC 14 2025
TODAY TONIGHT MON
CLOUD COVER MCLEAR CLEAR MCLEAR
PRECIP TYPE SHOWERS NONE SHOWERS
CHANCE PRECIP (%) 20 0 40
TEMP (24H TREND) 84 (+3) 63 (-6) 85
RH % (24H TREND) 58 (-9) 99 (+1) 54
WIND 20FT/EARLY(MPH) SE 13 SE 9 E 6
WIND 20FT/LATE(MPH) SE 13 SE 9 E 6
MIXING HGT(FT-AGL/MSL)5740 6650
TRANSPORT WND (MPH) SE 23 SE 6
VENT RATE (KT-FT) 114800 33250
DISPERSION 5 5
DSI 5 2 4
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ024-150815-
CAYEY MOUNTAIN RANGE-
407 AM AST SUN DEC 14 2025
TODAY TONIGHT MON
CLOUD COVER MCLEAR MCLEAR MCLEAR
PRECIP TYPE SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 10 20 20
TEMP (24H TREND) 80 (+2) 65 (-5) 81
RH % (24H TREND) 70 (-7) 100 (0) 66
WIND 20FT/EARLY(MPH) SE 13 E 10 SE 5
WIND 20FT/LATE(MPH) SE 13 E 10 SE 5
MIXING HGT(FT-AGL/MSL)4440 4610
TRANSPORT WND (MPH) SE 22 E 8
VENT RATE (KT-FT) 84360 32270
DISPERSION 5 5
DSI 6 3 4
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ025-150815-
VIEQUES-
407 AM AST SUN DEC 14 2025
TODAY TONIGHT MON
CLOUD COVER PCLDY PCLDY PCLDY
PRECIP TYPE SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 30 30 50
TEMP (24H TREND) 86 (0) 72 (-2) 86
RH % (24H TREND) 60 (-6) 94 (+1) 60
WIND 20FT/EARLY(MPH) E 16 G20 E 16 G20 E 10
WIND 20FT/LATE(MPH) E 16 G20 E 16 G20 E 10
MIXING HGT(FT-AGL/MSL)4170 2600
TRANSPORT WND (MPH) E 25 E 8
VENT RATE (KT-FT) 91740 18200
DISPERSION 5 5
DSI 6 6 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ026-150815-
CULEBRA-
407 AM AST SUN DEC 14 2025
TODAY TONIGHT MON
CLOUD COVER PCLDY PCLDY MCLDY
PRECIP TYPE SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 40 30 60
TEMP (24H TREND) 87 (+1) 73 (-3) 87
RH % (24H TREND) 59 (-8) 92 (-1) 61
WIND 20FT/EARLY(MPH) SE 17 G21 E 16 G20 E 10
WIND 20FT/LATE(MPH) SE 17 G21 E 16 G20 E 10
MIXING HGT(FT-AGL/MSL)4050 2670
TRANSPORT WND (MPH) E 25 E 9
VENT RATE (KT-FT) 89100 21360
DISPERSION 5 5
DSI 6 6 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ027-150815-
SOUTHWEST COASTAL PLAINS AND MONA ISLAND-
407 AM AST SUN DEC 14 2025
TODAY TONIGHT MON
CLOUD COVER MCLEAR MCLEAR MCLEAR
PRECIP TYPE SHOWERS NONE SHOWERS
CHANCE PRECIP (%) 10 0 10
TEMP (24H TREND) 88 (0) 69 (-5) 89
RH % (24H TREND) 58 (-4) 93 (+4) 54
WIND 20FT/EARLY(MPH) E 23 G30 E 16 G20 SE 12
WIND 20FT/LATE(MPH) E 23 G30 E 16 G20 SE 12
MIXING HGT(FT-AGL/MSL)4810 4260
TRANSPORT WND (MPH) E 26 E 10
VENT RATE (KT-FT) 110630 38340
DISPERSION 5 5
DSI 6 5 5
RH RECOVERY EXCELLENT
REMARKS...NONE.
VIZ001-150815-
SAINT THOMAS AND SAINT JOHN-
407 AM AST SUN DEC 14 2025
TODAY TONIGHT MON
CLOUD COVER PCLDY MCLEAR MCLDY
PRECIP TYPE SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 40 40 60
TEMP (24H TREND) 86 (+1) 71 (-5) 86
RH % (24H TREND) 60 (-9) 99 (+6) 64
WIND 20FT/EARLY(MPH) SE 17 G21 E 16 G20 E 12
WIND 20FT/LATE(MPH) SE 17 G21 E 16 G20 E 12
MIXING HGT(FT-AGL/MSL)3980 2750
TRANSPORT WND (MPH) E 26 E 13
VENT RATE (KT-FT) 91540 30250
DISPERSION 5 5
DSI 6 5 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
VIZ002-150815-
ST CROIX-
407 AM AST SUN DEC 14 2025
TODAY TONIGHT MON
CLOUD COVER MCLEAR PCLDY PCLDY
PRECIP TYPE SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 20 30 50
TEMP (24H TREND) 86 (+1) 71 (-5) 85
RH % (24H TREND) 62 (-8) 97 (+8) 65
WIND 20FT/EARLY(MPH) E 16 G20 E 14 G17 E 12
WIND 20FT/LATE(MPH) E 16 G20 E 14 G17 E 12
MIXING HGT(FT-AGL/MSL)4140 3210
TRANSPORT WND (MPH) E 22 E 14
VENT RATE (KT-FT) 78660 38520
DISPERSION 5 5
DSI 6 5 5
RH RECOVERY EXCELLENT
REMARKS...NONE.
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